The Google Hosted Libraries is a stable, reliable, high-speed, globally
available content distribution network for the most popular, open-source
JavaScript libraries.

Google works directly with the key stakeholders for each library effort
and accepts the latest versions as they are released.

Libraries

To load a hosted library, copy and paste the HTML snippet for that
library (shown below) in your web page. For instance, to load
jQuery, embed the <script
src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
snippet in your web page.

We recommend that you load libraries from the CDN via HTTPS, even if your
own website only uses HTTP. Nowadays, performance is fast, and caching
works just the same. The CDN's files are served with
CORS
and
Timing-Allow
headers and allowed to be cached for 1 year.

Web Font Loader

Troubleshooting

Seeing an outdated version? Make sure you're not using the "automatic version" links, like
/jqueryui/1/..., but instead use URLs referring to exact versions.
Due to concerns over caching and lack of compatibility between even minor versions, we have
deprecated and stopped updating the automatic version aliases some time ago, so they will
forever refer to an old version (in order to not break existing sites that still use them).

If you encounter problems:

Look for typos. Remember that JavaScript is a case-sensitive language.